package cn.heima.heima_netty.netty.c3.hello;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;

public class HelloServer {
    public static void main(String[] args) throws InterruptedException {
        //1.启动器:负责组装netty组件，启动服务器
        new ServerBootstrap()
                //2，BossEventLoop,WorkerEventLoop(selector,thread),group组
                .group(new NioEventLoopGroup())
                //3. 选择服务器的ServerChannel实现
                .channel(NioServerSocketChannel.class)//OIO BIO
                //4. boss负责处理连接 worker(child)负责读写，决定了worker(child)能执行哪些操作（handler）
                .childHandler(
                        //5. channel代表和客户端进行数据读写的通道Initializer初始化，负责添加别的handler
                        new ChannelInitializer<NioSocketChannel>() {
                            @Override
                            protected void initChannel(NioSocketChannel ch) throws Exception {
                                //6.添加具体handler
                                ch.pipeline().addLast(new StringDecoder());//将Bytebuf转换为字符串
                                ch.pipeline().addLast(new ChannelInboundHandlerAdapter(){//自定义handler

                                    //读事件
                                    @Override
                                    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                                        System.out.println(msg);//打印上一步转换好的字符串
                                    }
                                });
                            }
                        }
                )
                //6.绑定监听端口
                .bind(8080);
    }
}
